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Question

'A @ B' means ' A is the husband of B'

'A & B' means 'A is the mother of B'

'A # B' means 'A is the wife of B'

Which of the following option would mean 'P is the father-in-law of S'?

This question was previously asked in
SSC Stenographer 2019 Previous Year Paper (24-Dec-2020) (Shift 2)
The correct answer is

P @ Q & R # S

Understanding Blood Relations using Symbols

This question asks us to decipher relationships represented by symbols and find which symbolic expression translates to "P is the father-in-law of S". We are given the following definitions:

  • A @ B means A is the husband of B. This tells us A is male and B is female.
  • A & B means A is the mother of B. This tells us A is female.
  • A # B means A is the wife of B. This tells us A is female and B is male.

We need to find the option that represents the relationship where P is the father-in-law of S. The term "father-in-law" means the father of one's spouse. So, we are looking for a relationship string where P is the father of the person S is married to, or P is the father of the person who is married to S.

Let's analyse each option provided:

Analyzing Option 1: P @ Q & S # R

  • P @ Q: P is the husband of Q. This means P is male, Q is female.
  • Q & S: Q is the mother of S. This means Q is female.
  • S # R: S is the wife of R. This means S is female, R is male.

Combining these: P is the husband of Q, and Q is the mother of S. Since P is Q's husband, P is the father of S. Also, S is the wife of R. So, P is the father of S, and S is married to R. This makes P the father-in-law of R (father of R's wife), not S.

Analyzing Option 2: Q @ P & R # S

  • Q @ P: Q is the husband of P. This means Q is male, P is female.
  • P & R: P is the mother of R. This means P is female.
  • R # S: R is the wife of S. This means R is female, S is male.

Combining these: Q is the husband of P, and P is the mother of R. Since Q is P's husband, Q is the father of R. Also, R is the wife of S. So, Q is the father of R, and R is married to S. This makes Q the father-in-law of S (father of S's wife). This option does not mean P is the father-in-law of S.

Analyzing Option 3: P @ Q & R # S

  • P @ Q: P is the husband of Q. This means P is male, Q is female.
  • Q & R: Q is the mother of R. This means Q is female.
  • R # S: R is the wife of S. This means R is female, S is male.

Combining these: P is the husband of Q, and Q is the mother of R. Since P is Q's husband, P is the father of R. Also, R is the wife of S. So, P is the father of R, and R is married to S. This means P is the father of S's wife (R). Therefore, P is the father-in-law of S. This option matches the required relationship.

Analyzing Option 4: P @ Q & R & S

  • P @ Q: P is the husband of Q. This means P is male, Q is female.
  • Q & R: Q is the mother of R. This means Q is female.
  • R & S: R is the mother of S. This means R is female.

Combining these: P is the husband of Q, and Q is the mother of R. Since P is Q's husband, P is the father of R. Also, R is the mother of S. This means P is the father of R, and R is the mother of S. This makes P the paternal grandfather of S. This option does not mean P is the father-in-law of S.

Based on the analysis of all options, the expression P @ Q & R # S correctly signifies that P is the father-in-law of S.

Summary of Relationships

Option Expression Derived Relationships Relation of P to S
1 P @ Q & S # R P is husband of Q; Q is mother of S; S is wife of R. P is father of S. (Also P is father-in-law of R)
2 Q @ P & R # S Q is husband of P; P is mother of R; R is wife of S. P is mother of R. (Q is father-in-law of S)
3 P @ Q & R # S P is husband of Q; Q is mother of R; R is wife of S. P is father of R. R is wife of S. ⇒ P is father-in-law of S
4 P @ Q & R & S P is husband of Q; Q is mother of R; R is mother of S. P is father of R. R is mother of S. ⇒ P is paternal grandfather of S

Conclusion

Option 3, P @ Q & R # S, correctly establishes the relationship where P is the father-in-law of S.

Revision Table: Blood Relations & Symbols

Symbol Meaning Gender Implication
@ Husband of A is male, B is female in 'A @ B'
& Mother of A is female in 'A & B'
# Wife of A is female, B is male in 'A # B'

Additional Information: Solving Blood Relation Puzzles

Blood relation questions often involve decoding relationships based on symbolic representations or descriptive sentences. Here are some tips for solving them:

  • Identify the relationships each symbol or phrase represents clearly.
  • Note down the gender implications for each relationship if provided (e.g., husband means male, wife means female, mother means female).
  • Break down the given expression or statement into smaller relationship segments.
  • Combine the segments step-by-step, building a family tree or diagram if helpful.
  • Keep track of the gender of individuals as you build the relationships, as this can eliminate possibilities.
  • For multiple-choice questions, test each option against the target relationship.
  • Understand the definitions of common relationships like father-in-law, brother-in-law, paternal/maternal grandparent, etc.

Practicing with different types of questions helps improve speed and accuracy in solving blood relation problems.

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Similar Questions

  1. 'A + B' means 'A is the son of B'

    'A - B' means 'A is the husband of B'

    'A × B' means 'A is the wife of B'

    'A ÷ B' means 'A is the brother of B'

    Hence, if we consider K ÷ Q × M + R × D + H - L, then how is L related to M?

  2. 'A # B' means 'A is the sister of B'

    'A @ B' means 'A is the husband of B'

    'A & B' means 'A is the brother of B'

    'A % B' means 'A is the son of B'

    Which of the following expressions means 'U is the mother of D' ?

  3. ‘A + B’ means ‘A is the son of B’

    ‘A – B’ means ‘A is the mother of B’

    ‘A × B’ means ‘A is the father of B’

    ‘A ÷ B’ means ‘A is the brother of B’

    If ‘F × G ÷ K − M + S × W’, then which of the following statements is NOT correct?

  4. ‘A + B’ means ‘A is the son of B’

    ‘A – B’ means ‘A is the wife of B’

    ‘A × B’ means ‘A is the father of B’

    ‘A ÷ B’ means ‘A is the brother of B’

    If ‘C + M – S × K − P ÷ T’, then which of the following statements is NOT correct?

  5. ‘A + B' means 'A is the brother of B'

    'A - B' means 'A is the mother of B'

    'A × B' means 'A is the husband of B'

    'A ÷ B' means 'A is the sister of B'

    'A # B' means 'A is the daughter-in-law of B'

    If 'C - M + S + K × R # T', then which of the following statements is not correct?

  6. ‘E + F’ means ‘E is the father of F’ ‘

    ‘E – F’ means ‘E is the sister of F’ ‘

    ‘E × F’ means ‘E is the brother of F’

    ‘E ÷ F’ means ‘E is the son of F’

    If ‘B – C + Z × G + Q’, how is C related to Q?

  7. ‘A # B’ means ‘A is the husband of B’.

    ‘A @ B’ means ‘A is the daughter of B’.

    ‘A & B’ means ‘A is the sister of B’.

    If P & Q @ D # K @ S # T, then which of the following statements is NOT correct?

  8. 'A + B' means 'A is the mother of B'

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    'A × B' means 'A is the father of B'

    'A ÷ B' means 'A is the daughter of B'

    Hence, if we consider S + Z - R ÷ H - P + U × M, then which of the following is NOT correct?

  9. 'A + B' means 'A is the brother of B'

    'A - B' means 'A is the mother of B'

    'A × B' means 'A is the husband of B'

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    If C ÷ M - S + K - T × Q, then which of the following statements is NOT correct?

  10. ‘A + B’ means ‘A is the wife of B’.

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    ‘A × B’ means ‘A is the son of B’.

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Important Questions from Coded Blood Relation Problems

  1. If A @ B means A is the son of B, A # B means A is the husband of B and A * B means A is the daughter of B, then what does P @ Q * R # S mean? 

  2. If P $ Q means P is the husband of Q; P ! Q means P is the mother Q and P * Q means P is the daughter of Q, which of the following shows that Z is brother of W's wife, if Z is male?

  3. If P $ Q means P is the brother of Q; P ! Q means P is the mother Q and P * Q means P is the son of Q, which of the following shows that W is brother of Z?

  4. Read the following information carefully and answer the question given below:

    M * N means ‘ M is the sister of N’

    M % N means ‘ M is the father of N’

    M # N means ‘M is the mother of N’

    Which of the following option gives that, M is father of R?

  5. If ‘A + B’ means ‘A is the mother of B’, ‘A - B’ means ‘A is the father of B’, ‘A × B’ means ‘A is the brother of B’, ‘A & B’ means ‘A is the son of B’, then how is M related to K in the expression ‘N − M + T × L & G & K’?

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